amilo l7300 upgraded cpu not recognised

[chocci]

i am running an amilo l7300 with an upgraded cpu an intel pentium m 735 1.70ghz and 2gb of memory which are both above what the manual says it should run, but it boots into windows xp and 7 with no problems, but when i try to run the faster intel pentium m 745 1.80ghz i carnt get into the bios let alone windows, is this a faulty processor or does the bios not recognise the faster cpu.
i have the latest bios ,if its the bios is there any way to edit the latest bios to recognise the faster cpu before i flash the bios rom.

thanks in advance
chocci

[edwin]

With the latest bios it should run all M7x5 processors BUT not the M7x5a processors, so check carefully what you bought. Needs to have 400MHz FSB.