I am having difficulty in connecting my dvd player to direct TV and getting it to work. I've read on here how to do it, and tried everything I know how to, but still no luck! I have Direct TV and a Panasonic DVD S-25 player. Can someone help??

I would hook the DVD Player directly to TV on the best Quality you can, starting with HDMI, then Component(Red,Blue,Green,Red and White), S-Video, or Composite(Red, white, and yellow).
Select same input on TV(HDMI 1) etc.

If your TV only has a Cable fitting, and DVD does not, you can use a $5 Modulator.

I [B]I did this and it still doesn't work. I still cannot get the dvd player to work. Help!!

What cables and connections are you using out of DVD?
What Input are you connecting to on the TV?
Can you select source(HDMI,Composite 1, composite 2 etc)?

On dvd: white to audio out (L), red to audio out (r), yellow to video output. On TV: red to R, white to L, yellow AV2... all color coded.

I can select composite on the TV, is that what you mean?

Yeah, you got it, you just have to go to the TV and Select AV 2 with your Input or Source Button.
Some TVs can get the AV 1, AV2 etc by going below channel 2.
Good Luck
Let us know how you do?