diff --git a/kernel/main.cc b/kernel/main.cc
index 6b51ecb..2bcbe27 100644
--- a/kernel/main.cc
+++ b/kernel/main.cc
@@ -93,14 +93,17 @@ extern "C" int main() {
         DBG << "app " << i << " size " << appsize << " at " << appstart << endl;
 
         Thread* thread_ptr= new Thread(false, (void*)appstart, (appsize/4096)+1); //TODO fix edgecase on size=4096
+	      g.vault().thread_list[thread_ptr->id] = thread_ptr;
 
         g.vault().scheduler.ready(thread_ptr); //TODO fix edgecase on size=4096
         offset += 1+(appsize/4096);
-        g.vault().thread_list[thread_ptr->id] = thread_ptr;
 
     }
+    
+    Thread* thread_ptr = new Thread(false, (void*)0x4001000, 2);
+    g.vault().scheduler.ready(thread_ptr);
+    g.vault().thread_list[thread_ptr->id] = thread_ptr;
 
-    g.vault().scheduler.ready(new Thread(false, (void*)0x4001000, 2));
     //for(void* p=Multiboot::getModule(0)->getStartAddress(); p<Multiboot::getModule(0)->getEndAddress(); p=(void*)((uintptr_t)p+4096)){
     //    DBG << "module at: " << hex << p << endl;
     //    g.vault().scheduler.ready(new Thread(false, p));
diff --git a/kernel/syscall/skeleton.cc b/kernel/syscall/skeleton.cc
index 71d466a..c314a25 100644
--- a/kernel/syscall/skeleton.cc
+++ b/kernel/syscall/skeleton.cc
@@ -293,18 +293,17 @@ bool copy_from_phys(Vault& vault, uintptr_t phys_ptr, void* virt_ptr, size_t siz
 	size_t total_size = size + offset;
   four_lvl_paging_t* search_table = vault.scheduler.active()->paging_tree;
 
-	void* page_ptr = getFreeVirtSpace(search_table, total_size); // page aligned pointer 
-	if (page_ptr == nullptr) {
+	void* virt_addr =  getFreeVirtSpace(search_table, (total_size/4096)+1); // page aligned pointer 
+	if (virt_addr == nullptr) {
 		return false;
 	}
 	
-	uintptr_t virt_addr = (uintptr_t)(page_ptr) + offset;
-  for(uint8_t i =0; i<size/4096; i++){
-    setMapping(virt_addr, (void*)phys_ptr, vault.scheduler.active()->paging_tree);
+  for(uint8_t i =0; i<size/4096  +1; i++){
+    setMapping((uintptr_t)virt_addr, (void*)phys_ptr, vault.scheduler.active()->paging_tree);
   }
 
-	memcpy(virt_ptr, (void*)(virt_addr), size);
-	PageFrameAllocator::free((uintptr_t)(page_ptr));
+	memcpy(virt_ptr, (void*)((uintptr_t)(virt_addr)+ (uintptr_t)offset), size);
+	PageFrameAllocator::free((uintptr_t)(virt_addr));
 	
 	return true;
 }
@@ -315,11 +314,17 @@ bool send(Vault& v, int pid, const void* sbuffer, size_t ssize, void* rbuffer, s
 	Thread* current_thread = v.scheduler.active();
 	Thread* target_thread = v.thread_list[pid];
 
-	uintptr_t sbuffer_ptr = isMapped((uintptr_t)sbuffer,v.scheduler.active()->paging_tree);
+	uintptr_t sbuffer_ptr = isMapped((uintptr_t)sbuffer,v.scheduler.active()->paging_tree) + ((uintptr_t)sbuffer&0xFFF);
+IpcStruct msg {
+  .ptr        = sbuffer_ptr,
+  .size       = ssize,
+  .pid        = current_thread->id,
+  .is_answer  = false,
+  .queue_link = nullptr
+};
+
+
 
-    // Erstelle Nachichtenobjekt
-	IpcStruct msg = {sbuffer_ptr, ssize, current_thread->id, false, nullptr};
-	
 	target_thread->ipc_queue.enqueue(msg);
 	target_thread->ipc_sem.v(v);
 
@@ -370,9 +375,8 @@ bool reply(Vault& v, const void* buffer, size_t size) {
   Thread* other_thread = v.thread_list[ipc->pid];
   if (other_thread == nullptr) return false;
 
-  uintptr_t phys_ptr =  (uintptr_t) current_thread->paging_tree;
-
-  ipc->ptr = phys_ptr;
+  uintptr_t phys_ptr = isMapped((uintptr_t)buffer, current_thread->paging_tree );
+  ipc->ptr = phys_ptr + ((uintptr_t)buffer & 0xFFF);
   ipc->size = size;
   ipc->pid = current_thread->id;
   ipc->is_answer = true;
diff --git a/kernel/thread/thread.cc b/kernel/thread/thread.cc
index 61f5e35..ab2cc71 100644
--- a/kernel/thread/thread.cc
+++ b/kernel/thread/thread.cc
@@ -78,6 +78,8 @@ Thread::Thread 	(bool kernel, void * startframe, int num_pages): queue_link(null
 		.address = (uintptr_t)(appstack_table) >> 12
 	};
 
+
+
 	prepareContext(StackPointer.isr, context, kickoff, reinterpret_cast<uintptr_t>(this), 0, 0);
 }
 
diff --git a/kernel/thread/thread.h b/kernel/thread/thread.h
index 4d07572..49b0544 100644
--- a/kernel/thread/thread.h
+++ b/kernel/thread/thread.h
@@ -21,7 +21,7 @@
 #include "../memory/pagetable.h"
 
 /// Stack size for each thread
-constexpr uint32_t STACK_SIZE = 3072;
+constexpr uint32_t STACK_SIZE = 3472;
 
 
 struct IpcStruct {
diff --git a/user/app1/appl.cc b/user/app1/appl.cc
index 8f1067c..8cd7168 100644
--- a/user/app1/appl.cc
+++ b/user/app1/appl.cc
@@ -55,12 +55,12 @@ extern "C" void main() {
 	for (unsigned i = 1;; ++i) {
 		if(id == 2){
 			send(4, text, strlen(text), text, 5);
-			write(1, text, strlen(text), 15, (int)id);
+			write(1, text, strlen(text), 25, (int)id);
 		}
 		if(id == 4){
 			char blubb[10];
 			receive(blubb, 10);
-			write(1, blubb, strlen(blubb), 15, (int)id);
+			write(1, blubb, strlen(blubb), 25, (int)id);
 			reply("toast", 5);
 		}