EC unstable

[Spideywoman]

So, I have a mule in EC tunnel and upon logging onto her I have between 10 and 30 seconds before my entire screen freezes. I have tried to stay on this character to see if it will unfreeze for around 15 minutes and was unsuccessful. I have my cleric at the tunnel and she works just fine upon logging in. I tried logging on my mule onto a different computer and it worked fine. So it is just that character and I can only assume my computer. I'm not really sure what could be causing this problem so any information would be nice. Thank you!