HTC Desire - Headphones Sound

[whoframedrevs]

Hello all MIUI members,

I installed this ROM about a week ago and I've only just noticed that I have a problem.
Everytime I insert my headphones the sound doesn't seem to come out via the headphones. The sound comes out via the actual phone instead!

Is this a bug?

I need help please.

Thanks

Revs
HTC Desire