How To Check Invisible Yahoo By Yahoo Messenger?

with www.xeeber.com you can detect Invisible users on yahoo! messenger. with this you can know Yahoo Messenger user's is really offline or in invisible how this site work?

I wanted to know How to check if someone block me or not in my Yahoo messenger. Actually, someone whose named CJ has answered me y'day in this page. But still need more detail. meant step by step coz this is my 1st time to use yahoo messenger to my friend...

I have a couple of permanently blocked people on my Yahoo Messenger. Deleting their name allows them to message me again and see when I'm online, since it isn't blocking their name anymore. But even if I leave them blocked in Yahoo Messenger program...

I met a girl on yahoo messenger & we chatted well & became friends. She said she wants us to be great friends & she said she only has 2 friends in her yahoo messenger friendlist & both are her classmates & are (girls) so now I want...

I was downloading Yahoo! Messenger when a message says "Yahoo! Messenger is unable to unload files needed for installation, please check Fire Wall setting and retry". How do I do this?

does any1 know any software which checks availability status of specific yahoo IDs periodically and notifies me when they become online (or invisible)?

because i was chatting my friend on yahoo messenger and i was ask to check there profile but ni was not able to check it

the old messenger would let you click on view profile and then type in name; but new messenger is not allowing me to do that. can i uninstall this new messenger and get old one back. dont like it at all.

There is a small pop up at the bottom of my screen that says 3 email messages with email messenger. How do I check these? I click on it, but it always takes me to yahoo email. I am confused.