Gigabyte EP45-UD3P Vista 64 not recognizing 4GB of Ram

[kyle xy]

So I just got my new PC up and running with Vista 64:
Gigabyte EP45-UD3P
Intel C2D E8500
4GB OCZ Sli-Ready DDR2 800
Seagate 7200.11 500GB
HIS ATI HD4870 1GB

Well everything is working fine but my system profile within Windows says I only have 2 GB of Ram. Is this incorrect in Windows or do I have a memory issue?

Thanks for any help!

 

[Blain]

Does your BIOS show 4GBs?
If not, you may need to reseat your DIMMs.

 

[kyle xy]

Thank you I thought to check that...then...well I didn't. I will get back to you.

 

[kyle xy]

Bump

Bios claims it only has 2048 MB of RAM as well. I don't see anything in BIOS on how to remap the memory.

Any ideas?

 

[kyle xy]

bump...any ideas?

 

[kyle xy]

*Edit*

Update: my issue is resolved. Turned out to be a seating issue just as the wise Blain suggested. Thank you sir!

 

[Blain]

Now maybe people will listen to me about SpinRite.