SQL Engine is not using the memory(RAM)

Hi,

In my environment, SQL engine is not using whole memory which is assign to it.

We have assign 13 GB RAM to SQL server but it is using only 82 MB.

Configuration of server is as below:

OS= Widows server 2008r2 standard(SP1) 64 bit

AWE is not enable in SQL

RAm : 16 GB

Hard disk: 200 GB

SQL Version: sqlserver 2008r2 enterprise edition(SP2)