[pvrusb2] Cannot edit Video Standard using sysfs

[cardboil]

My card is recognized and I can see the sysfs files.  However, my is
recognized as SECAM-L but I need it to work in PAL-BG.  When I edit the
cur_val file using vi in the ctl_video_standard directory, it doesn't let me
write.  I get the following when I do :wq in vi:

"cur_val" E667: Fsync failed

Any ideas on how else I can change the value to PAL-BG?