Help Problems with Gtalk & Apps in Market Wont Download

For the past couple of weeks I've been experiencing problems with downloading apps from the Android market. I went online and searched through a few sites and saw that it was acting that way because of my google account. So, I signed in and out of gmail and things were there same so then I tried signing on to Gtalk but it took forever and it forced closed in the middle of signing in. Please help!