Pretty sure avdven nailed it ......

Not sure about version 10 but with previous versions

On the server there is a setting ....require password to uninstall...reset that and push to clients.

Done

or try the default password

symantec....

there is a file you can drop on the client to reset the server...again...with earlier versions

or phone symantec tech suport...if you have version 10 I think you probably have some free support

MLF