srnet:
The example programs for that library set the frequency of operation to 915Mhz.That can damage 433Mhz modules and can produce symptoms of extreme short range.
The example programs need to be changed so that the frequency of operation is 433Mhz.
If you post the code you are actually using its much easier for the forum to help you.
I change the frequency in example to 433 Mhz,
Regards