Ive recently switched ISP and ever since, ive been having problems. Most of the time when i click connect it checks my username and password for longer than usual then 4 times out of 5, it will give me an error about the username and password being invalid on the domain. Then if i do get connected it will kick me out randomnly.

I know its not a problem with my setup but what is the problem at the ISP's end?

ISP: TalkTalk (UK)

p.s. Im going back to my old ISP.