Gateway desktop fx 7026 memory issue, has 4 slots came with( 2 )2 gb sticks = 4 gigs it came with. when i add 2 extra gig it doesnt recognize.

The specs i read says 8 gig is the max. here is what it says for RAM
RAM

• Installed Size 4.0 GB / 8.0 GB (max)
• Technology DDR2 SDRAM
• Memory Speed 667.0 MHz
• Form Factor DIMM 240-pin
• Features Dual channel memory architecture
• Configuration Features 2 x 2 GB

check to make sure you have added the right type of memory. also look at your user manual. it should tell you where and how to place the added sticks. sometimes they have to be added in pairs or have to be in specific slots. also if you dont have the manual it is on the gateway site. you should type in your model and serial number and get all the info you need.