Problem Generating BC

[hachacha]

Ok well I've read the FAQ and understand that with the average modern PC it could take about 3 weeks to generate 50BC (at least that is how I understood what I read). I have a decent PC, nothing great. Anyways I've been running bitcoin since July 12. Within 1 day I generated 50BC. Now ever since then it hasn't generated any BC for me. It appears to be working fine, the usual X number of khash/s, says its Generating, 8 connections, 79933 blocks and counting, and 6 transactions. I can send and receive BC with no problems. So my question is, why have I not generated any BC since July 13? Am I just being impatient or what? Did the rate of BC generation change? Am I doing something wrong? I didn't really change any computer habits, so whats the deal?
Sorry if this is a stupid question.

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[Insti]

If you have not upgraded to > 0.3.9 you will not be able to generate any blocks the rest of the network will accept.

[LZ]

Difficulty increases (link) - now it is not so easy to generate.
And also you should check that your port 8333 is open (link).

[hachacha]

Oops, looks like I wasn't running the latest version. Thanks.