ECS L7S7A2 Overclocking Questions

Greetings . . . .

I have tried on occasion to OC my MB and processor. I have an ECS L7S7A2 mb and an AMD 2400 + chip. I have tried to increase the multiplier to bump it up to the 2600 range, but no go. Wierd stuff happens.

So - my question is this: Do I need to mess with anyvoltage settings to get it to work? It seems with such a slight bump it should operate with no problems. If I do need to tinker with the voltage settings, what shoud they be set at? And, excuse my ignorance, but please differentiate between the BIOS software settings and the jumper\physical settings.

Thanks for any help - I do appreciate it.