If the length of the 3 beeps is the same and short then
<A HREF="http://www.sysopt.com/biosbmc.html" target="_new"> Reseat Memory </A>
Reseat the memory. If it still fails try good memory.
If you have two sticks of memory try using only one.
Did you make sure the memory you bought is compatible with that board?
The loving are the daring!