My door will not lock

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The L Series lock can fit into a door prepped for the SCHLAGE K Series with some additional prep as described here.  
K and L trim and parts are not interchangeable. 
The easiest method to obtain an AL lock for a 2" door is to specify a 2" thick door when ordering.  
Part required by function:2 each A700-043 driver & A700-034** lever insert in addition to the chassis parts below:AL10S – 2 hubs A700-028AL25D – 2 hubs 1 A700-028 (inside), 1 A700-030 (outside)...
The keycam may have failed, example here, the latest design keycam can be easily identified as the colored changed to black. Replace either the keycam or chassis as needed to r...
 This could also happen if the tailpiece isn't installed in a KIL, FSIC, or SFIC cylinder.  The FSIC driver also could have come loose from the core in the spindle.
Changes to the Falcon W501 latch offering were made on 2/13/2012.   Prior to 2/13/2012: The W501 entry lock was supplied with a restoring latch which causes the button to pop and unlock...
Hinge Spacing: All 4 1/2" and 5" butt hinge spacing 1. Opening heights 3'0" through 4'11 15/16" (one pair butt hinges) from under head CL 9 3/4" (top of door 9 5/8") from bottom of frame ...
Hinge Backset: On the frame = 5/16" On the door = 1/4"
Lock Spacing: All standard bored locks ANSI 115.2 (161, 61L type), for mortise lock ANSI 115.1 (86 type) all locations must be altered 3/8" lower, and standard strike (ASA type). 1. Opening ...