phpFormGenerator: no valid number error

[jod999]

Hi x10

I've just set up my site and installed phpFormGenerator via Fantastico.

It seems straightforward enough:

Step 1: number of fields
please enter the number of fields your form is going to have. enter only numeric digits. the number should be between 1 - 99​

I enter 5 (for example).
It returns a new page:

Step 2: describe the fields
...
The following errors occured while processing your request:
You did not enter a valid number. Please use a number between 1 and 99.
​

I tried this on both Opera and Firefox, with exactly the same result, so I don't think that it is a browser or caching error.

Please note that I'm not trying to code the forms myself. I'm trying to use the FormGenerator to code the fields.

Is anyone else using phpFormGenerator? If so, do you have experience with this error?

Any advice greatly appreciated.
Jonathan