All these years I efile the forms 4868 for my foreigns taxpayers before June 15, but this year Proconnect dont let me, they show me 

"E-file Transmission Failure
You are past the deadline for new filings.
If you need help resolving, please contact customer support.
Problem occurred transmitting efile data"

I call the proconnect support and they tell me that the form 4868 need to be efile before april 15

but like I said last year I submitted the extension on June 12th and the systems let me and the IRS accept my extension

Someone can help me with this 

Thanks