Hanif,
First, have you checked these steps to enable syslog to the LEM?
Store logs in external server - InterScan Web Security Virtual Appliance (IWSVA)
Step 5 is where you'd want to enter the LEM's IP.
Then, SSH into the LEM:
SolarWinds Knowledge Base :: Use an SSH client to connect to your LEM appliance
Go to APPLIANCE and run a CHECKLOGS. If you go through the logs, can you find data from the Trend Interscan device?
Hint: If you type "/" while you're looking at the log, you can enter the IP of your Trend device to see if it's in the log.
Once you know which logs the Trend is sending data to, have you configured connectors to read those logs?