[5pot]

Hi folks, first time poster and new to Crackberry.com.
I have a 9780, my first Blackberry, (UK user) and I love it.
However, in the last couple of months I have found a problem - every time I try to log into the app store it gives the following message:

"A problem has occurred, please try again later"

This has been happening for a couple of months now, and happens even when trying to apply updates. I could live without the app store, so was happy to ignore it, but when I tried to apply the most recent update for Twitter it has removed Twitter from my phone! And I can't re-install it as I get the same error message when I try to log in!
Help!
Apologies if this has been covered already. I appreciate this may have nothing to do with my phone being a 9780, but does anyone have any suggestions?

Thanks.