I have just taken my A07XLB out of one of my computers and put it into a spare external enclosure and ImgBurn 2.2.0.0 is fine
As suggested see if there is a firmware update for your Enclosure, also if your using front usb or using a Hub, try connecting them to the usb ports at back on motherboard, also check power cable and usb cable at back of enclosure to make sure they are right in and not hanging out slightly. Open enclosure up as well and make sure power cable / IDE cable are in secure and that you have the jumper set to Master on the Pioneer.
Please note that the device string is DVR-107D but I assure you it is the A07XL Version and on that note anyone with this drive if you right click in Imgburn on drive and check for firmware updates the search string will take you to the wrong firmware for the XL version (DO NOT USE not compatible with XL version), check on rpc1.org manually for the A07XL versions.
Edit just to make sure it had nothing to do with firmware as mya07 was 1.18 updated it to 1.22 and all is still ok Imgburn 2.2.0.0 works as normal with this drive.