Hi,
First of all, testing standard type Virtual Server (VS) with HTTP profile attached using telnet is pointless. This type of VS will always accept telnet connection, even will ACK keystrokes send during telnet session... but nothing will be passed to backend servers.
Second, if you expect any real help please provide some hard data about your config. At least post output of following commands (masking what you consider confidential) - of course you need access to CLI or at least tmsh shell:
- tmsh list ltm virtual [your VS name]
- tmsh list ltm pool [pool name used by VS]
There is to many factors that could cause issues to give real advice.
Piotr