Random disconnected

I have random disconnect problem. it can be after 5 mis or it can be after 1 hour of playing.
I download from the download link in warmane website, and then i add elfui addon.
I tried playing without addon (fresh from download) and with addon, both of them cause random disconnected.
Once i DC, it says player with same name exists. it takes around 20-30 seconds to be able to login.
This happen very often (even during raiding and boss fight) and cause big problem (wipe and no EOF/drop).
Please help. Thank you.

Exactly same you say for me before my internet got broken, i think that trying to log on warmane servers is breaking my internet, i need to call a technical to solve it, now that i was going to play again my internet got broken again.
I play in Lordaeron (hust in case of something matters)

Where are you from, near barcelona? Maybe we are close.