What's wrong with my Dyson Vacumn Cleaner?

My Dyson Lught Ball vacumn cleanerwill work without the bin canister. Once I attach the canister it sucks hard, but can't push! Getting disgusted! Have cleaned all filters and looks good, but somethings wrong.

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0