Dab controller described a separation error when traffic was allowed to land on runway 7R and runway...

Narrative:

A C172 was on a 3 mile final to runway 16. A DA42 was on a 5 mile final. I had 5 aircraft holding short of runway 16 awaiting departure. I circled the C172 to runway 7R to get some departures out; prior to the DA42 landing on runway 16 and the C172 landing on runway 7R. After getting a couple departures out; I cleared the C172 to land on runway 7R and then cleared the DA42 to land on runway 16. At that time another aircraft had departed and tagged up on the wrong code; I called ar-north to inform them. The C172 was rolling out on runway 7R and was told to turn left at whiskey; no response; and was then told to hold short of runway 16 and he said unable. I turned to see the DA42 progress on the runway 16 final and saw that it wasn't going to work so I told the DA42 to go around on runway 16 and the pilot said we just touched down. Recommendation; review lahso order with reference to type aircraft that can land and hold short at dab. I realized after the fact that I had more things I could have done and didn't react in time to send the aircraft around.

Original NASA ASRS Text

Title: DAB Controller described a separation error when traffic was allowed to land on Runway 7R and Runway 16 simultaneously; the reporter suggesting the existing LAHSO Order be modified to allow this type of operation.

Narrative: A C172 was on a 3 mile final to Runway 16. A DA42 was on a 5 mile final. I had 5 aircraft holding short of Runway 16 awaiting departure. I circled the C172 to Runway 7R to get some departures out; prior to the DA42 landing on Runway 16 and the C172 landing on Runway 7R. After getting a couple departures out; I cleared the C172 to land on Runway 7R and then cleared the DA42 to land on Runway 16. At that time another aircraft had departed and tagged up on the wrong code; I called AR-N to inform them. The C172 was rolling out on Runway 7R and was told to turn left at Whiskey; no response; and was then told to hold short of Runway 16 and he said unable. I turned to see the DA42 progress on the Runway 16 final and saw that it wasn't going to work so I told the DA42 to go around on Runway 16 and the pilot said we just touched down. Recommendation; review LAHSO order with reference to type aircraft that can land and hold short at DAB. I realized after the fact that I had more things I could have done and didn't react in time to send the aircraft around.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	952758
Time
Date	201106
Local Time Of Day	1201-1800
Place
Locale Reference	DAB.Tower
State Reference	FL
Aircraft 1
Make Model Name	DA42 Twin Star
Flight Phase	Landing
Route In Use	None
Flight Plan	VFR
Aircraft 2
Make Model Name	Skyhawk 172/Cutlass 172
Flight Phase	Landing
Route In Use	None
Flight Plan	VFR
Person 1
Function	Local
Qualification	Air Traffic Control Fully Certified
Events
Anomaly	Conflict Ground Conflict Critical

Dab controller described a separation error when traffic was allowed to land on runway 7R and runway 16 simultaneously; the reporter suggesting the existing lahso order be modified to allow this type of operation.