How do i make my mpk49 pads work with samples, in other words, when i press the pad once the loop will play or the sample will play all the way threw, but right now when i press the pad, it only plays how long i hold the pad.

Have a look in your manual at the sections on Note Repeat and Time Division.NOTE REPEAT] – Holding this button while
striking a pad causes the pad to retrigger at a
rate based on the current Tempo and Time
Division settings. The Note Repeat feature can
be synced to an internal or external MIDI Clock
source. [NOTE REPEAT] can function as a
latching or momentary button
19. [TIME DIVISION] – This button is used to specify
the rate of the Note Repeat and Arpeggiator
features. When [TIME DIVISION] is activated,
you can press one of the 8 switches to specify a
time division. [TIME DIVISION] can function as a
momentary or toggle button.
Please note that while [TIME DIVISION] is active,
the 8 assignable buttons will not function as MIDI
CC or Program Change switches until [TIME
DIVISION] has been de-activated.
20. [ARP ON/OFF] – This button enables and The manuals and updates can be downloaded here:http://www.akaipro.com/mpk49 Please let me know if this helps.