ive just recently upgraded my ram.
I have bought
x2 sticks of DDR2 667mhz 2gb ram
x2 sticks of DDR 1gb ram
I have this motherboard
when the ram is in it wont recognise all 4 and it will only boot up on single core than dual. and it will only recognise 2 gb instead of the 6 or even when the 2ddr2 are in it wont recognise that there are 4 gb in and only recognise 2
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Your motherboard won't support BOTH DDR2 & DDR RAM simultaneously. In other words, you either run the DDR RAM ---or--- the DDR2 RAM. This is what's traditionally called a 'transitional' set-up, where when upgrading from a mobo that ran the slower DDR RAM, a consumer could make the move to a more modern board and use the older DDR RAM until DDR2 could be afforded.
Go back and read your motherboard manual, or download one at the link you provided. Also, your mobo only supports a MAXIMUM of 2GB of either type (DDR2 or DDR). Send it all back and get 2 sticks of DDR2 (2 x 1GB).