See the sticky at the top of the page helppage on Private Message Storage Limits
http://www.ausfish.com.au/vforum/sho...storage-limits
As of 29/08/2012
set at
New Member - 5
Bronze Member - 50
Silver Member - 75
Gold Member - 100
Platinum Member - 150
Addict - 250
Premium Member - 500
But for some reason your Membership level is showing Bronze. I will look into that and try to fix now for you