Its been a while since i posted as i can't get on at work (Where i have most of my spare time

I've had a couple of pints of my honley mild the past few days after a couple of weeks of none, as i was trying to make it last till i get a nother brew on the go. It doesn't taste as good as it did, its not bad or off just not quite as nice as it was.
I haven't had any luck looking back through the archives looking for my posts when i kegged it but how long would would you expect to keep a brew once kegged??
Ian