[sqlmap-users] about http 500 error

[root <ro...@cn...>]

hi
when i use sqlmap to inject web app,i recvied this

 unable to retrieve the number of columns 'username' entries for table 'K_members' on database 'demo_test'
[13:39:03] [WARNING] HTTP error codes detected during testing:
500 (Internal Server Error) - 3 times

but i can get database name and tables etc..

this is a timebase bind sqlinject.i dont kown,why can not get data from columns..
if this is a web app's bug,why i can get tablename and columns..
if not,what happen?why this....

2011-09-19 



thks&Best Regards 
robert