Do you have a mod set to load on startup?

I had a similar issue, i removed all mods,custom maps and forge maps from both the app data galaxys and prog files galaxy, then it worked for me

harpo

I have the exact same problem.  I did like Psyco567 said and verify the installation.  Impulse said entrenchment is not installed correctly and look for an update but there's no update button.  I've also tried to uninstall entrenchment but it says "The is an error in XML document (28, 8)" and won't let me uninstall.  I've tried to uninstall through the Add/Remove Programs in the Control Panel but it wouldn't let me uninstall either.

Edit:  Clicking some where else then select Entrenchment seem to refresh it and I get the update button now.  In the game though, the icon for the mines, starbase and the newer ship seem to be missing so I don't know if it's ralated or not.  Another thing is even though it's playable now, if I verify the install again, it keep saying that the installed incorrectly and promt me to download the same update over and over again.  I still won't let me uninstall Entrenchment, to do a fresh install.

 Thanks for the advice, but I think I'm going to have to uninstall Sins. By the way, should I uninstall entrenchment or the regular sins