Signs causing lag on tekkit lite server HELP!

[p928s1984]

Title: Signs causing lag on tekkit lite server HELP!

Version: 3.1.3

OS: Server 2012 or server 2008 or linux

Java Version: most up to date

Description of Problem:

when we either place more than about 20 signs, either with writing or for our sign shop (essentials) we get lots of lag. cant fly or even move sometimes. the server has been up and running for about 6 months now, and we have had the problem from day one and just ignored it. now want to use our nice shop we made and need help!

Error Messages:

no errors that i can see

Error Log:

no errors in the log that i can see.