DLL中的CreateThread - ERROR_NOT_ENOUGH_MEMORY

i've got this dll that creates a thread when loaded by LoadLibraryA, the dll is injected into another process using RtlCreateUserThread, the injection succeeds, the dll is loaded into the target process (kernel32 LoadLibraryA thread is there) but when it comes to the CreateThread i got ERROR_NOT_ENOUGH_MEMORY, so where is the problem RtlCreateUserThread or the target process or the DLL itself? and how may i solve it? thanks alot!!i've got this dll that creates a thread when lo