Cant add Dragino devices any more

II try to add new sensors from Dragino to Cayenne a LHT-65 and a LDDS75
Two other Sensors. LHT 65 and a LGT 92 are working fine.
If I put all the information and the DEV EUI the green field to add the device remains greyed out and the device cant be added.

can you PM me a screenshot.