Login script

Hello , Has anybody know got a idea about using a login script on 64bit PC with 32bit WinXP?

I am a Technical support of my company, I am putting a 32bit WinXP into a 64bit PC. And everything is fine except the login Script. The PC can’t not connect the domain in my company. Keep having a error message ” the specified domain can not be connected or network does not excits” every time I login. but it works for 32bit WinXP on a 32bit machine and 64bit WinXP on a 64bit machine.

Any Ideas??

Very appreciated