How to troubleshoot ClamAV updating

[Guest]

[wheelz]

I have two Endian 2.4 servers in gateway mode.  One is updating the ClamAV definitions automatically but the other does not have any signatures listed.  I do not think it has ever worked (these are relatively new).  I click the Update Signatures Now button on the one that does not work and it chugs away for a long time and then just stops.  Anyone know where to start troubleshooting this?  Looking for logs to look at or perhaps some command line commands to try it manually.  Thanks.