Pearl writes "MICROSOFT SQL-DMO (ODBC SQLSTATE:42000) error 14274: cannot add, update or delete job that originated from an MSX server. I am getting this error message because my SQL server used to be called something else and i created a database maintenance plan then and now i can delete or amend it without getting that error message. Please help.
Maintenance plans are easy to create using the wizard. Why don't you copy the original plan's steps in a new one then delete the original? (This doesn't answer your question but at least your dbs will be backed up, checked & optimized again).
I think the problem is Pearl changed his/her server name without re-installing SQL Server. This would mean his/her plan would be trying to look for old server name instead of the new one. This can cause problems in other places, not just maint plans.