Locating 2 parameters at the same address

I am using an 8051 (C51/BL51) with no off-chip memory. I have two functions with parameters:

void Detect( U8 iLed )

and

static U8 INHSampleHandler( U16 u16Sample )

Now I understand that Keil will allocate a variable (in DATA) for these. The problem seems to be that the locator is using the same memory location for both. I cannot understand why.

Below are excerpts from the scratchpad showing 2 "D:0026H". These are the only places these symbols are declared. Any ideas what I'm doing wrong?

Thanks,
Jeff

BL51 BANKED LINKER/LOCATER V5.12              07/14/2011  09:36:23  PAGE 1


BL51 BANKED LINKER/LOCATER V5.12, INVOKED BY:
Z:\TOOLS\SOFTWARE\KEIL\BL51.EXE Z:\Software\FB_CPU_Init.obj,
>> Z:\Software\Settings.obj, Z:\Software\Glo
>> bals.obj, Z:\Software\Devices\Clock.obj, Z:\ 
>> Software\Devices\Flash.obj, Z:\Software\Devices\HMI.obj
>> , Z:\Software\Devices\INH.obj, Z:\ 
>> Software\Devices\ADC.obj, Z:\Software\Devices\Timer.obj, Z
>> :\Software\Builds\TestINH - 06-00039-21-09\Main.obj
>> , Z:\Software\Test\Test_Button.obj, Z:\So
>> ftware\Builds\TestINH - 06-00039-21-09\Version.obj TO Z:\ 
>> Software\Builds\TestINH - 06-00039-21-09\06-00039-21-09-xx.wsp
>>  RS (256) PL (68) PW (78) XDATA (?XD?SETTINGS (0X0)) CODE (?CO?VERSION (0X7
>> FC0))


MEMORY MODEL: SMALL

Deleted for brevity

  -------         PROC          _INHSAMPLEHANDLER
  D:0026H         SYMBOL        u16Sample
  C:0BF1H         LINE#         150
  C:0BF5H         LINE#         151
  C:0BF5H         LINE#         207
  C:0BF7H         LINE#         208
  -------         ENDPROC       _INHSAMPLEHANDLER
  -------         ENDMOD        INH

Deleted for brevity

  C:09FEH         PUBLIC        _Detect
  C:074EH         PUBLIC        main
  -------         PROC          _DETECT
  D:0026H         SYMBOL        iLed