Hi Marlena
This didn’t make it to 2.0 – I’m working on it for 2.1.
The reason for your problem is because of PHP upload limits – the form is so big it is exceeding one of these limits:
max_execution_time
max_input_time
memory_limit
upload_max_filesize
post_max_size
You can try to increase these in your environment or ask your host to increase these to see if you can get away with more fields.
The only way to get around this I think is to have a separate screen for entering post meta – or have the custom fields synced with your real live data – so you don’t need to enter any so many options manually (the second option is my preference).
There were some other big features (like a full caching system) that first needed to be implemented in 2.0 before I could add this – this has now been created so I am free to move on to this feature.
Sorry for the delay however I didn’t realise all the work that needed to be done before we could move on to this.
Thanks