You will need .Net Framework 1.1 or higher to run this program.
If a .Net framework has not been installed in your system, use below link to choose a suitable .Net Framework.
http://msdn.microsoft.com/en-us/netframework/aa569263
Sri Lanka Telecom Reverse Directory 2011 February
Download Link,
https://rapidshare.com/files/2666457044/SLT_Reverse_Directory_2011.zip