Suppose the conversion from MS Access to SQL Server was done in SQL Server
Version 2000 and after that some modification of database properties done in
SQL Server 2005 Express. Is it possible to open and or modify from SQL
Server 2000?.

We are having this problem. The database first created in SQL 2000 then
modified in SQL 2005 Express. After that when we tried to open and modify in
SQL Server 2000 then it is giving error message:-
ERROR 602: could not find row in sysindexes for database ID 7, object ID 1,
index ID 1. Run DBCC CHECKTABLE on sysindexes.

We will be glad to hear from you about any solution for this problem