Mozilla/Thunderbird

[Sponger]

Hello all!

First off might I say that FC2T2 is AWESOME!
Hhehe...
Now,
I have a problem with Mozilla and/or thunderbird.  If I have thunderbird 
open and try and open mozilla this is the error I get:
"Error Launching Browser window: TypeError:
Components.classes['@mozilla.org/appshell/component/browser/instance;1'] 
has no properties"

and it will not let me open up mozilla.
If I close thunderbird and try and open up mozilla it works fine.

Mozilla version: 1.6
Thunderbird: .5

Any help would be appreciated!

Thanks guys!!!

Dave