Orders not completing properly with PayPal Standard

[DragonLady]

I'm not sure. When I was testing things I had PayPal Express installed, but when ever I tried to go through the checkout procedure I got errors. I relayed them to my hosts who told me the server my site is on is too old to update, but they offered a "free migration" to what I suspect is going to be a much more expensive service.

I'm still talking back-n-forth with them about it, because I already pay a huge monthly bill to them, but experience all kinds of downtime and problems like this one. I might be forced to look for new hosting, but that remains to be seen. I've been with the same company for ten years, so hopefully we can work something out.

[DrByte]

Sounds like they can and should move you to a different server.
If you're using v1.5.5 as you initially suggested, then you should be compatible with a newer server.