Hi,
The reasons can be different. Please check for error messages in the recording log.
You can also try with Ajax Click and Script and by setting WinInet level date in Recording options->Port mapping.
Additionally there is a limitation if you are using Windows 2003 R2. Please check LR_11.52_ReadMe.pdf
If you record your application with Web(http/html) protocol, why do you need to use Web-click and script protocol? Web(http/html) protocol and Ajax TruClient protocol support newer technologies. It is recommended to use them instead of Click and Script protocols.
Kind regards,