thanks for the suggestions....i have reinstalled 64-bit...everything is fine....but one problem shows when trying to unrar files>

Error:1 /var/www/html/jahir16/rar/rar: /lib64/libc.so.6: version `GLIBC_2.7' not found (required by /var/www/html/jahir16/rar/rar)
How to solve this? rar is working fine.