Promblem in sldcheck

Hi,

When i run SLDCHECK rfc connection and xi profile is working fine but the following error is coming

calling function LCR_LIST_BUSINESS_SYSTEMS

Retriveing data from SLD Server

exception return code 4

Check whether the SLD is running

the pipe line url is given as

http://server:8000/sap/xi/engine?type=entry

Please suggest

Thanks

Abdul