Why does a messenger keep signing me out?

i go to sign in yahoo messenger and it sign's me out and back in yahoo messenger for no reason

I have Windows Vista and until now my Windows Live Messenger was working fine but now it keeps signing me out randomly and then signing me back in. Why? I have deleted and downloaded ...show more

Ok While on yahoo it keeps signing me in and out for no apparent reason. I dont know if its because of a bug or what. Signs out and then right back in many times. Also I have a problem when somone sends me a message i sometimes dont get them were are...

I have Yahoo Messenger version 9.0.0.2162 and it keeps signing off and then signing back on about 15 seconds later. It does this several times a day. Any ideas?

as soon as i sign in 2 yahoo messenger,within three minutes messenger will start signing me out then back in on it's own! this is constantly,like every 3-5 minutes.

I have windows live messenger and msn plus and i keep getting signed off automatically like when i'm in the middle of conversations. I signed into windows messenger to see if the ...show more

I keep having to sign back into Yahoo Messenger. I have checked the keep me signed in box and tried it. I've tried it without the box marked. I didn't used to have to sign in every time. It was automatic. I want it to be automatic, again.

i talk to friend with the text sms option but today it keeps signing me out , not out of my yahoo acount just messenger

msn messenger keeps signing me out, how come it does this ?