Having some trouble with a "Language string failed to load: tls" error.

Hello,

I'm using SMTP Authentication Support 6.x-1.0-beta3 on Drupal 6.14 and I keep getting this "Language string failed to load: tls" error every time I try to send a test e-mail. The interesting thing is that when I try send an e-mail via my Hotmail account which also happens to use TLS it works perfectly, but when I try to send an e-mail via the account that my ISP provided for me I get that Language string failed error. I'm not sure if it creates any language compatibility problems with this module or not but my ISP is a Japanese company called OCN.

I've searched everywhere for a solution but found nothing so far. Please help.