Strange Pattern

[Chino46]

Of the last fourteen times I have opened an account with an online poker site and played limit holdem, twelve times I have killed the competition (three to five big bets per hour) for about two days. Then after a few days I start losing and I'm unable to ever win there again. The two times I didn't succeed from the start the site was identical to one I already played at except for the colors.

I don't understand how I can make three to five big bets per hour for a few days and then never win again. I mix up my play pretty good (not that anybody is noticing at the low limits).

Any ideas? Thanks in advance.