FC Miles with BMI?

I'm flying MAN-ORD-DEN with BMI/UA in December.
Reading the FC pages on the VS website, it seems as if I can now claim FC miles when flying with BMI. Is that correct?
I've only flown with BMI once before, several years ago, and joined Diamond Club then but am unlikely to ever accumulate enough DC miles to be of any use. As I recall, at that time FC miles weren't an option when flying BMI.
If I can now claim FC miles with BMI, can I do it by showing my card at check-in? I've tried to have my FC number added to the booking but I booked through an online travel agent and they haven't been able to do it, which means only my DC number is showing. They suggest I contact BMI direct. However, the reason I booked this flight through an agent was because it proved impossible to do it direct with BMI, mostly due to the language difficulties.
(The MAN-ORD leg is in PE, ORD-DEN in economy. The BMI online booking system does not allow for this. I tried to book by phone several times but BMI Reservations insisted variously that it could not be done and even that the flight did not exist, despite my giving them the flight numbers. When I faxed a UK number they eventually replied 2 weeks later quoting a price higher than the full return journey in Business! Meantime I found a travel agent website where it was very easy to book exactly what I wanted online and at a reasonable price.)
So, phoning BMI about this is not an option. Life is too short!
Any advice would be appreciated.
Reading the FC pages on the VS website, it seems as if I can now claim FC miles when flying with BMI. Is that correct?
I've only flown with BMI once before, several years ago, and joined Diamond Club then but am unlikely to ever accumulate enough DC miles to be of any use. As I recall, at that time FC miles weren't an option when flying BMI.
If I can now claim FC miles with BMI, can I do it by showing my card at check-in? I've tried to have my FC number added to the booking but I booked through an online travel agent and they haven't been able to do it, which means only my DC number is showing. They suggest I contact BMI direct. However, the reason I booked this flight through an agent was because it proved impossible to do it direct with BMI, mostly due to the language difficulties.
(The MAN-ORD leg is in PE, ORD-DEN in economy. The BMI online booking system does not allow for this. I tried to book by phone several times but BMI Reservations insisted variously that it could not be done and even that the flight did not exist, despite my giving them the flight numbers. When I faxed a UK number they eventually replied 2 weeks later quoting a price higher than the full return journey in Business! Meantime I found a travel agent website where it was very easy to book exactly what I wanted online and at a reasonable price.)
So, phoning BMI about this is not an option. Life is too short!
Any advice would be appreciated.