Cannot Increase CPU Multiplier - Help?

Question

Here's my problem:
I've unlocked the CPU Multipliers on my AMD XP-1600+ by
connecting the L1 bridges.  System boots & runs OK with
stock (10.5 x 133) multiplier value (I'm running that right
now).  I can also reduce the multiplier (10 x 133).
When I try to increase it (11 x 133) the system won't
POST; I have to power-off/on (then I get to re-enter ALL
BIOS data). javascript:smilie('X(')
Mad
Can anyone give me a clue what's wrong?  Have I blown
the unlocking; will my mobo just not support increased
multipliers...??  I've had the system running stable @ 148
Mhz FSB before unlocking it (and at least 140 Mhz after).
Here is my H/W setup:
KT7266-Pro (6380) Ver 1.0 mobo with Ver 1.9 BIOS
Ver 4.43 4-in-1 Drivers, Ver 30.82 Detonator.

Answer 1

Thanks for the reply wonkanoby - yes, I did;  first cleaned
out the 'ash' then filled them with JB-Weld.
This is the 2nd time I've tried unlocking.  The first time, the
BIOS reported clock speed as 1200 Mhz no matter what I
did.  Well, I hope the 3rd time does it - that's a bloody
tedious job, even with a 5x 'hands-free' magnifier.
BTW, what do you recommend for removing rear-window
de-fogger paint?  I've been using acetone.