Problems in opening the Enterprise Manager

Hi,

I had one perfectly windows a 2003 with the SP2 and SQL Server twirling. Later that I came back the server toward the SP1 I I do not obtain more to enter in the Enterprise Manager. It of the o error

MMC Cannot open file “….\ SQL Server Enterprise Manager.MSC”

Somebody could help me?

Reinstall client tools... some dll might have got corrupted..

Madhu