Why can't I log in to my Yahoo messenger?

I always tried to log in yahoo messenger the one i downloaded but i cant log in but i can sign in messenger through web..How can i use my webcam if i cant log in to messenger..

i can"t log on to yahoo chat from from my yahoo messenger. normally i used to log on to the chat room from my messenger but now i can"t.

when i log in to my yahoo messenger it will log back off ..log on and off....or it will log off then i have to log on..and this is over and over...ive tried everything i know...can someone please help me...

It worked fine yesterday.

i have tried to log into yahoo messenger under my yahoo id, it wont let me.but i can get into any chat client i want to in the same id,,what could be up ??

Heres what happend... i was using YM for 10 mins then i decided to restart my pc... then when i come back i cant log i to YM anymore... i never get pass to "signning in as (username)... But i can log into to the YM option in the mail... can someone...

I have contacted technical support, dell support, yahoo tech and no one can tell me how to get my yahoo messenger to work. I have tried for hours a day for months and get get no one to help me get back on yahoo messenger.

i can go online, and i'm able to access all websites. whenever i try to log into yahoo messenger it wont let me log on. my id and password is correct. i even removed the program from my computer and reloaded, but it still wont let me access. i have no...