I'm writing a python frontend for this snmp application, to store results and show graphs, however I can convert your mib to python because it have a lot of errors, and dont know how build mibs.
To see complete error list, go to http://www.simpleweb.org/ietf/mibs/validate/urls.php and put raw url from your mib, than submit.
Well, I'm not a mib writer, so I'm not surprised :)
I'll try to fix that in a subsequent patch.
Fix #18 & #19 - fix validation errors of the MYSQL-SERVER-MIB
This should fix all the validation errors and warnings.
Let me know if you still have difficulties to import the mib.