.Map :: MoHAA Mapping

i cannot acces my texture any more,i use it before but now iclik on tab texture,and noting appear under texture lock as usual..... thanks if can help

IAM NEW TO MAPPING,IS SOMBODY CAN TEL ME HOW I CAN GUET BACK MY TEXTURE. I USE IT TO MAKE ROOM EVERY THING OK ,NEXT DAY TRY TO PUT NEW TEXCTURE EVERY THING DISAPER. THANKS:(