sorting 4 numbers with controller and datapath

[Altera_Forum]

hi 

i'm working on a machine that sorts 4 numbers with 4 bits. i can't understand why it doesnt work. i made it by ussing "bubble sort" technique all files here include an image of the machine. the machine works well with the second and the third numbers but it doesnt works with the first and the fourth. compare2 - the comperator contcomp- controller top - the main. thanks in advance

[Altera_Forum]

an easy way is to address four locations (out of 16) with the numbers serially and write value 1 there then read them back. 

 e.g. if address sequence (A,B,C,D] is 11, 15,0,1 then  addresses 0,1,11,15 will be set to 1, others 0 read back from 0 to 15 min will be first address with 1 and so on