Forum:Light and Darkness Dragon vs. Counter Traps

Okay so here is the dilemma. I declared an attack with my Light and Darkness Dragon at full strength and my opponent activated the Counter Trap Negate Attack. Now I know LaDD can't use its effect against Counter Traps but my friends steadily suggests that my LaDD still loses the 500 ATK and DEF even though it didn't negate Negate Attack. Please tell me whether my LaDD loses ATK and DEF and why please.