J2EE Compatability Problem

I have Successfully Run my Web application using Tomcat 4.1.27 and when i port my war file in the Oracle 10g it is not working.,

i have written a servlet to validate the users., when the User submits the username and password., rather than executing the servlet it is asking me to download the file named like <name of the servlet>7287921 like that., When i saved the file it is a blank file and when i click to open it is saying nothing

Kindly help me out.,

zaki

[496 byte] By [zaki_gonewiththewinda] at [2007-10-1 0:26:48]