Print driver host for 32bit applications

I have just upgraded my operating system from windows XP to windows 7(64 bit) and I have a xerox phaser 6180mfp.
I downloaded the 64 bit driver and installed it. And the test page printed out just fine during installation.
The problem now that I am trying to print a document from word 2003 and from internet explorer 8 and all I get is a message that:

Print driver host for 32bit applications
Print driver host for 32bit applications has
stopped working
Windows is collecting more information about the problem.
This might take several minutes….
The system cannot solve the problem and I can't find anything helpful on the Microsoft support site. If anyone faced this problem before please tell me what can I do ?
Can anyone help me?
