2CheckOut Error code 103

-- url of the page with the problem -- : happytoys.cl
-- HikaShop version -- : 2.5.0
-- Error-message(debug-mod must be tuned on) -- : An error has occurred during checkout.
Please contact the seller and reference the error code below.
ERROR CODE:PE103

Hello everyone,

Recently I bought the 2CheckOut plugin, the first day it work perfectly. I didn't important changes in the system, just keep uploading products, now every time that I try make an order when I jump to the 2CheckOut page I got this:

An error has occurred during checkout.
Please contact the seller and reference the error code below.
ERROR CODE:PE103

I google it the error code "PE103", it say that it could be an error with the price, but the prices are right in the website.

Any suggestion? Thank you
_______________________________UPDATE___________________________

I just add a shipping price, and i notice that the product price is not passing to the pay. screenshot attached.

_______________________________UPDATE 2 ___________________________

in previous attempts i tried with a product who is price was over 1,000USD, I put in the cart a cheaper product (below 1000 usd) and there is no problem. Any suggestion mates? (screenshot attached)

_______________________________UPDATE 3 ___________________________

Ok, finally the problems seems to be the comma separator, because in the 2CO support site, they say:

"Price is passed in with a comma (example: passing in 1,000 as the price will cause PE103)." link attached.

I tried changing the group separator (which is by default a comma) by a "point" and a blank space, but it doesn't work both. Also I tried changing it by a point, and the final result is the same. Any suggestion.