Hello, at the minute i am using an ashdown mag 4x10" combo and i have a little problem with it. When my bass is pluged in I get a wierd clicking sound whenever i touch any metal part of the bass. This comes out on the strings the most but when i allready have my other hand on the strings (when my left hand is pressing the frets) the clicking stops. When i turn up the volume the clicking also gets louder. This also happened to my little marshal 25 watt practice amp but i thought that might have been just the amp. What do you think it could be and how would i get rid of it.