Linked Server Error

We had to reinstall MSSQL on one of our servers now when I set up a linked
server and try to associate a login I get the following error:
Msg 15466, Level 16, State 2, Procedure sp_addlinkedsrvlogin, Line 91
An error occurred during decryption.
Msg 15185, Level 16, State 1, Procedure sp_addlinkedsrvlogin, Line 98
There is no remote user 'sa' mapped to local user '(null)' from the remote
server 'TEST'.
Is there a fix for this it works from another server with the same edition
and configuration.I figured it out:
ALTER SERVICE MASTER KEY FORCE REGENERATE
"davids@.thorntonsinc.com" wrote:

> We had to reinstall MSSQL on one of our servers now when I set up a linked
> server and try to associate a login I get the following error:
> Msg 15466, Level 16, State 2, Procedure sp_addlinkedsrvlogin, Line 91
> An error occurred during decryption.
> Msg 15185, Level 16, State 1, Procedure sp_addlinkedsrvlogin, Line 98
> There is no remote user 'sa' mapped to local user '(null)' from the remote
> server 'TEST'.
> Is there a fix for this it works from another server with the same edition
> and configuration.