[sqwebmail] Quota

[DOODS]

Hello. I'm new to this list. Is there an archive available for this list? I believe my question has been asked several times already but I'm going to ask this again. Sorry.
I have the latest versions of vpopmail and sqwebmail running smoothly. However I noticed that the quota displayed isn't updating even if I already deleted all the mails, logged out and in again. What I did was to just modify the quota setting and the displayed figure was updated. I also read that it should be updating itself within 15 minutes but it didn't.
Is there something that should be done to correct this?
Thanks!