Strange problem???

Hi my spec are as below
CPU:Intel E8400(stock)
MAIN:Abit IP35 PRO XE
VGA:Zotac 9800 GTX+
CASE:NZXT Tempest
POWER:Silverstone Strider 700 Watt
Memoryatriot 800 LLK (2X1 GB)
i bought another (2X1 GB) Patriot LLK kit and installed it but i couldn't boot with 4-4-4-12 2.2v
but it did with privious kit then i raised DDR2 Voltage to 2.3v it didn't boot either so i set DDR2 Voltage to auto and it booted.another problem is that when i use CPUZ it shows my first and third module as 6400LLK with EPP 400 4-4-4-12 2.2V which is correct but it shows my second and fourth module as 6400LL with EPP 400 4-4-4-12 2.1V which is wrong the second and fourth Modules are the new ones any idea why my new modules are identified as 6400LL 2.1v? could these modules be defective?i looked in patriot site they don't have 2.1 Modules and also on my modules's sticker it is written 6400LLK 2.2v.can any one help me?

@jitpublisher Thanks for your input do you think that i should raise voltage like you did?isn't it dangerous?if i have go as far as you did should i raise mch voltage also or it is irrelevant?