Cannot start db

Hi, I am getting the following message when i try to start my database:
ORA-00704: bootstrap process failure
ORA-00604: error occurred at recursive SQL level 2
ORA-08103: object no longer exists

Thu Oct 07 02:58:45 2004
Error 704 happened during db open, shutting down database
USER: terminating instance due to error 704
Instance terminated by USER, pid = 736

I moved the datafiles to a new location and had this problem:
SQL> alter database rename file 'C:\ORACLE\ORADATA\TRAIN1\UNDOTBS01.DBF' to 'E:\

Database altered.

SQL> alter database open;
alter database open
ERROR at line 1:
ORA-01122: database file 2 failed verification check
ORA-01110: data file 2: 'E:\ORACLE\ORADATA\TRAIN1\UNDOTBS011.DBF'
ORA-01251: Unknown File Header Version read for file number 2
ORA-1092 signalled during: ALTER DATABASE OPEN...

I dropped the datafile and now have the problem above. I cannot restore the UNDOTBS011.DBF.
Is there anyway to get around this?