Do you Crash when loging in then try this

[Jaidyn Piers]

Since you are able to log in without crashing with an alt account, it seems unlikely to be a connection issue, which was my first thought. (I could be wrong and will not exclude this still).

Somewhere along one of these paths -

(Windows - In folder options, choose to show hidden files/folders.)
XP: C:\Documents and Settings\<username>\Application Data\SecondLife\
Vista and Windows 7: C:\Users\<username>\appdata\roaming\SecondLife\
MacOSX - /Users/<username>/Library/Application Support/SecondLife/
Linux - /home/<username>/.secondlife/

you should find a folder for your avatar(s). Try (re)moving the folder for the avatar that is causing issues and start the viewer again. There may be a file in there somewhere which is causing the viewer to crash/log you out.

[LoveAngeL Lyre]

Hello Jaidyn. Here is the Questions and Answers Page. We post here if we have a question, or if we try to answer to a question. Your suggestion is good (also the solution in your previous question - log in issue) but it would be better to post it in SL Forums. 

[valerie Inshan]

Thank you very much for sharing Jaidyn. It would certainly be very helpful for many residents if you posted this also in the Second Life Viewer subforum. Kudos for the tip anyway! :smileywink:

http://community.secondlife.com/t5/Second-Life-Viewer/bd-p/SLViewer

[Nalates Urriah]

Good idea and thanks for the post. I added the idea to my Can’t Login Second Life post. I provided a more selective approach to deteing the files than just wiping the whole folder. Since one should also be aware that deleting the avatar's folder also deletes chat logs.

My article also covers a similar login problem that is caused by V3.1 code that is present in both the Linden Lab and Third Party Viewers. Phoenix Viewer users have been getting advice on that problem from Phoenix Support.