Unable to access text messaging after updating to ICS
I do know that if you have a lot of messages on your RAZR before upgrading to ICS, it actually will try to pull them all in again to the text messaging app. I have seen this with both stock and GoSMS on a Droid 4 and it did take a little while on my RAZR MAXX the first time I opened up the messaging app after upgrading to see all of my messages re-appear, as they first appeared as if they had all been deleted.

If you are getting the little circular loading symbol, then it is likely the case - for a couple thousand messages, it took nearly all day to load them all. Not sure why, but this may also be what's effecting you. I guess the only solution is to wait it out and see what happens. Hope this helps and good luck getting your messages back.