Unable to install .sh format file of netbeans in ubuntu 11.1

Hello experts,
I am unable to install a .sh format file of netbeans in my ubuntu 11.1.
When I tried to do this, I got this result:
"hridesh@ubuntu:~$ cd Desktop/ hridesh@ubuntu:~/Desktop$ cd full netbeans 7.2 for linux in .sh format/ hridesh@ubuntu:~/Desktop/full netbeans 7.2 for linux in .sh format$ ls how to install.txt netbeans-7.1.2-ml-linux.sh hridesh@ubuntu:~/Desktop/full netbeans 7.2 for linux in .sh format$ chmod +x netbeans-7.1.2-ml-linux.sh hridesh@ubuntu:~/Desktop/full netbeans 7.2 for linux in .sh format$ ./netbeans-7.1.2-ml-linux.sh Configuring the installer… Searching for JVM on the system… Extracting installation data..
Installer file /home/hridesh/Desktop/full seems to be corrupted".
Is it actually corrupted or something else is wrong ???
Please suggest me something.
