ASP Space and my Forum ?

Hey guys hopefully someone here can help me out. I just started admining a website and forum. All of our space and hosting are here on ASP.net

We are running a forum with dotNetBB Forum version 2.42EC SP3. We had issues in the past running out of room and the forum crashing. I see there is no more tech support from dotnetBB anymore for the forum software so I want to make sure we are covered.

In order to increase the disk space with ASP our forum is it SQL Database space we need to buy ? Once that is done do you know if I have to allocate that new space within the dotnetBB software or is it automatic once you assign the new space ? A few weeks ago I increased our SQL disk space but I don’t believe I saw it increase within our forum software which currently reads like this. Any advice on what to purchase from you and how to allocate it would be appreciated. As I said I increased our SQL space a few weeks ago and it is now at 700MB from 500 I belive but I cannot figure how to make sure that extra space is assigned to the forum portion of the stuff on ASP. Any advice would be appreciated !!

Current Database Information

NOTE : Database may include other data beyond what is being used by dotNetBB

Database Name : SQL2005_22699_forum
Database Physical Size : 561.88 MB
Database Unallocated Space : 229.92 MB
Database Reserved Space : 327568 KB
Database Data Size : 209888 KB
Database Index Size : 106800 KB
Database Unused Size : 10880 KB