General Google Market problem

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http://androidforums.com – I rooted my phone using SuperOneClick. Now i can't download anything from the Market. I cleared Market update, i reset my phone to factory settings, nothing... I browse the market, and when i want to download something, it popups "Your application will be downloaded" or something like that, and then nothing. Now i don't know what to do. I looked here, but nothing was helpful. :( (General)