This problem i encountered yesterday with my ANDROID TABLET,,this is about the (Google talk Authentication failed) so i open google to find a solution to my problem..and this what i got
Google Talk Authentication Failed
Open Settings>Applications>Manage Applications>All
1. Press the Apps icon (4 squares in a square) on the home page
Note: apps are arranged in alphabetical order
1. Press Settings
2. Press Applications
3. Press Manage Applications
4. Press the ALL icon at the top of that page
2. Scroll down (by pushing the screen up - alphabetical order) and
3. Press Google Services Framework
4. Press Force Stop and then Clear data
5. Press the Back Arrow at the bottom of the page
6. Press the All icon at the top of the page
7. Scroll down and click Market
8. Press Clear Cache in the middle of the page
9. Reboot the Nook and you should be able to download again
I hope it help you a lot :)
Google Talk Authentication Failed
Open Settings>Applications>Manage Applications>All
1. Press the Apps icon (4 squares in a square) on the home page
Note: apps are arranged in alphabetical order
1. Press Settings
2. Press Applications
3. Press Manage Applications
4. Press the ALL icon at the top of that page
2. Scroll down (by pushing the screen up - alphabetical order) and
3. Press Google Services Framework
4. Press Force Stop and then Clear data
5. Press the Back Arrow at the bottom of the page
6. Press the All icon at the top of the page
7. Scroll down and click Market
8. Press Clear Cache in the middle of the page
9. Reboot the Nook and you should be able to download again
I hope it help you a lot :)