BE55 PLT LANDED WITHOUT CLRNC.

Narrative

I WAS INBOUND TO HOUSTON HOBBY ARPT ON THE ILS RWY 12R. I HAD INTERCEPTED THE LOC ABOUT 15 MI OUT AND DOING A SLAM DUNK APCH OUT OF 5000 FT IN ORDER TO INTERCEPT THE GS OUTSIDE THE OM. I MADE THE 6.5 DME 2000 FT INTERCEPT COORDINATES 1 MI EARLY AND WAS GIVEN A NEW CLRNC TO TURN TO 210 DEGS AND CLB 2500 FT FOR VECTORS ILS RWY 4. AFTER SEVERAL MISCOMS (THE APCH CTLR WAS CALLING THE WRONG TAIL NUMBERS WITH DIRECTIONS); WE WERE ABLE TO GET SET UP FOR THE ILS RWY 4. I WAS TURNED TO JOIN THE LOC CLOSE IN AND OBSERVED WE WERE ALREADY ABOVE THE GS. I REDUCED PWR AND PUSHED OVER TO CATCH THE GS AND AT THE OM I HAD JUST OVER 1/2 DEFLECTION AND WAS GAINING ON IT. I KNEW THE APCH HAD TO BE NAILED AT THE MIDDLE MARKER DUE TO THE LOW CEILING AND VISIBILITY. AT THE MIDDLE MARKER THE APCH WAS NAILED AND I WAS ABLE TO PICK OUT THE RABBIT AND CONTINUED THE DSCNT. I PICKED UP THE CTRLINE SHORTLY THEREAFTER AND CONTINUED FOR A LNDG. ON THE ROLLOUT; I REALIZED WE WERE STILL WITH HOUSTON APCH AND THAT WE HAD NEVER BEEN HANDED OFF TO TWR. I QUICKLY CALLED THEM AND TOLD THEM WE WERE DOWN AND WAS INSTRUCTED TO EXPEDITE CLRING THE RWY. WE CLRED; WERE GIVEN TAXI INSTRUCTIONS AND ASKED TO CALL THE TWR. HOW THE PROB AROSE: FAILURE TO VERIFY LNDG CLRNC. CONTRIBUTING FACTORS: HIGH PLT WORKLOAD; POOR WX; PLT/APCH COM PROBS. CORRECTIVE ACTION: INCORPORATE CONFIRMATION OF LNDG CLRNC IN GUMPS CHK. HUMAN PERFORMANCE CONSIDERATIONS: 1) EXTREMELY HIGH WORKLOAD. 2) FAILURE TO CONFIRM CLRNCS. 3) PUSHED A LESS THAN OPTIMUM APCH.