Here you have to set the environmental path's system variables. Which will you get by
right clicking on My Computer properties Advanced Environmental variables. Then you select path option from System Variables and select Edit option. Then u have to mentioned the jdk's path as follows. C:\Program Files\Java\jdk1.6.0_14\bin after that give semi colon and set the avd file path.
C:\Documents and Settings\tpbhade\.android\avd like this
. Give the semicolon. and click on ok button. Then u restart u r Eclipse. and go to project menu unchecked Build Automatically option, and click on Build all option. your problem will be solved.
Thanks,