SideRadio issue

[Grwyler 1]

I am having an issue in making a radio dialogue using sideRadio in my sqf. In mission I am only able to hear the first 2 ogg files (out of 6).

This is my sqf under "scripts" folder

RO sideRadio "M1S1";
Sleep 4;

[WEST, "HQ"] sideRadio "M1S4";
Sleep 4;

RO sideRadio "M1S2";
Sleep 4;

[WEST, "HQ"] sideRadio "M1S6";
Sleep 4;

[WEST, "HQ"] SideRadio "M1S7";
Sleep 4;

RO sideRadio "M1S5";

And this is my description.ext

class CfgRadio
{
 sounds[] = {M1S1,M1S2,M1S4,M1S5,M1S6,M1S7};
 class M1S1
 {
   name = "M1S1";
   sound[] = {"sound\M1S1.ogg", db+0, 1.0};
   title = "LongRifle this is Patrol 2-1";
 };

class M1S2
 {
   name = "M1S2";
   sound[] = {"sound\M1S2.ogg", db+0, 1.0};
   title = "Roger, request entry to friendly lines from the north with 1-1 packs, How copy";
 };

class M1S4
 {
   name = "M1S4";
   sound[] = {"sound\M1S4.ogg", db+0, 1.0};
   title = "Papa 2-1 LongRifle, go ahead";
 };

class M1S5
 {
   name = "M1S5";
   sound[] = {"sound\M1S5.ogg", db+0, 1.0};
   title = "Copy, Tango, Out.";
 };

class M1S6
 {
   name = "M1S6";
   sound[] = {"sound\M1S6.ogg", db+0, 1.0};
   title = "1-1 packs from the north, Go ahead";
 };

class M1S7
 {
   name = "M1S7";
   sound[] = {"sound\M1S7.ogg", db+0, 1.0};
   title = "Be advised, LongRifle's calsign des for you is now, DUCKFACE, How copy";
 };

};

I apologize if this is not all the information that I need to provide for proper help.

Any help or guidance would be very much appreciated.