Need some help hooking the jump function

[{ Angelius }]

is this what i need to execute from my proxy in order to make the player jump where i wanted him to jump ?

PHP Code:

005C943F   . FF75 D0        PUSH DWORD PTR SS:[EBP-30]
005C9442   . FF75 D4        PUSH DWORD PTR SS:[EBP-2C]
005C9445   . E8 9FABE3FF CALL Conquer.00403FE9
005C944A   . 8BC8            MOV ECX,EAX
005C944C   . E8 03C20B00 CALL Conquer.00685654
005C9451   . EB 6E           JMP SHORT Conquer.005C94C1

aka (jump function) 


If so.. then what makes the client crash when i execute this ?

PHP Code:

writer.Write((byte)0x68);
writer.Write(Xh);
            
writer.Write((byte)0x68);
writer.Write(Yh);

writer.Write((byte)0xE8);
writer.Write(0x403FE9);

writer.Write(new byte[] { 0x8B, 0xC8 });

writer.Write((byte)0xE8);
writer.Write(0x685654); 


Thanks.

[IAmHawtness]

//push x
writer.Write((byte)0x68); 
writer.Write((uint)Xh); 

//push y             
writer.Write((byte)0x68); 
writer.Write((uint)Yh); 

//mov eax, 0x403FE9
writer.Write((byte)0xB8); 
writer.Write((uint)0x403FE9); 

//call eax
writer.Write(new byte[] { 0xFF, 0xD0 }); 

//mov ecx, eax
writer.Write(new byte[] { 0x8B, 0xC8 });

//mov eax, 0x685654
writer.Write((byte)0xB8); 
writer.Write((uint)0x685654); 

//call eax
writer.Write(new byte[] { 0xFF, 0xD0 }); 

//ret
writer.Write((byte)0xC3);

This is what you want your assembly output to look like:

push X
push Y
mov eax,00403FE9
call eax
mov ecx,eax
mov eax,00685654
call eax
ret