[Konstantinos]

Debug it:

pawn Code:

stock SendReportToQue(reportfrom, reportto, report[])
{
    printf("SendReportToQue(%d, %d, \"%s\")", reportfrom, reportto, report);
    // rest of the code
}

And make sure it is:

pawn Code:

if (sscanf(params, "rs[128]", giveplayerid, text)) return SendClientMessage(playerid, COLOR_GRAD2, "Usage: /report [id] [reason]");
// Specifier "s" needs the size and it becomes: "s[size_here]".

What does it print to the console?