error while uploading

i am makin a web application for uploading files using jsp

netbeans tomcat...

i m using commons package for uploading files....

i have added commons library in particular web application also and in

java library manager also....

but whenever i compile my code...

wherever i using function of commons package i get the error....

symbols not found....

please

please

please help me......

[451 byte] By [anshul_goyala] at [2007-11-27 4:15:30]