DSpace collection giving internal error

[Abhinav kumar Srivastav]

Hi Sir,
I am Abhinav  Kumar Srivastav working in Delhi. Sir i configure Dspace on Window machine. i face some problem

1. when administrator is going to approve any submission item it give "Internal Error" like stack error etc.
2. when i register as new user it give eroor "Internal System Error
3. when i submmit any collection its giving error "Internal System Error

The system has experienced an internal error. Please try to do what you were doing again, and if the problem persists, please contact us so we can fix the problem.

Sir, Kindly help me for solving the above problem

[Abhinav kumar Srivastav]

hi,
anyone can help me how to create two localhost in same tomcat or two dspace instance on same tomcat.

Thanks & Regards,
Abhinav Kumar Srivastav