I did, but it didn't work
I use my Data to download.
When I open Market, there is no option to show "Accounts", but I do have my mobile synced with my Gmail. I've already been receiving emails on it too.
I'm not sure if this is the problem, but when I went into Install, all these things showed up in orange, as if the settings weren't right for install.
If that is the case, I'm not sure how to change these:
Storage, Modify/Delete SD card contents
Network Communication, full internet access
Phone calls, read phone state and indentity
System tools, prevent phone from sleeping.