i have a dell xps 400

sys specs are as follows

Chipset - Intel 945P chipset

Precessor - Intel Pentium D CPU 2.80Ghz 2.79Ghz (thats what windows says it is)

this is what dells web page says (Intel® Pentium® D Processor up to 840 (3.2GHz, 2MB L2 cache, 800MHz FSB) with Dual Core Technology.

Video card is a EVGA 9800GT

RAM i have 4gs installed

Operating systems - Windows 7 utimate 64 bit ,Ubuntu 9.10 ,iATKOS v7 not bootable

now my problem is

FIRST - i installed it with win 7 and ubuntu already installed i installed iATKOS to its own partition and because of how i have everything installed i use Grub loader so i went into Ubuntu and updated the grub loader (update-grub) got the iATKOS to show up on the loader now when i select it the screen flashes and restarts the computer Ive tried reinstalling it with different custom options selected including trying a basic's only to no avail..

SECOND TRY - i pulled all my HDD and installed a fresh one for a single boot of iATKOS got it installed with no problems restarted computer got it to boot up to the screen where the lizard is on the top of the screen and you can choose what type of boot you want and i tried all of them and got as far as the Grey apple screen flashes and then it restarts so once again im stuck..

ill do my best to give you all info you need to help me..

any and all help is greatly appreciated thank you

John S.