system installation - cannot install ubuntu 12.04 LTS using bootable pendrive

I have downloaded Ubuntu 12.04 LTS -64bit ISO file and created bootable pendrive using Startup Disk Creator.

Using this pen drive,when i try with "install Ubuntu" or "Try ubuntu without Installing" installation stops at ubuntu pink screen background.

I already have 12.04 LTS -64 bit and 32 bit in my laptop,Am trying to install Ubuntu 12.04 LTS -64bit in new partition.

I have tried this pen drive with different desktop/laptop and it works fine with "install Ubuntu" or "Try ubuntu without Installing" so i don't have any doubt with my bootable pen drive.

please suggest me how can i overcome with this issue.

Regards
Senthil