Stored Procedure And A DB With Collate That Is CI...

i have a sp that when i add to a CS database it doesnt give me an error but when i add to a CI database it errors out.
what can i do to it to make it not error on the CI situtation?

set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
go


-- Accounts Payable
ALTER PROCEDURE [dbo].[isp_ap_calc_apt_totals]
@p_comp char(2),
@p_vend char(6),
@p_asofdate char(8)
as

if (@p_asofdate <= '00000000')
begin
set @p_asofdate = '99999999'
end

delete from XAPAPTTOT
where xapt_comp = @p_comp and xapt_vend = @p_vend and xapt_asof_date = @p_asofdate

insert into XAPAPTTOT
select apph_comp, apph_vend, apph_type, apph_id, @p_asofdate,
sum(apph_paymnts),
sum(apph_discts),
sum(apph_adjts),
count(apph_paymnts),
sum(apph_paymnts)+ sum(apph_discts) + sum(apph_adjts) +
(select apt_gross from APTRANF
where apt_comp = @p_comp and apt_vend = @p_vend
and apt_type = apph_type and apt_id = apph_id),
0,
max(str(yy,4) + replace(str(mm,2),' ','0') + replace(str(dd,2),' ','0'))
from APPHISTF
where apph_comp = @p_comp and apph_vend = @p_vend
and str(yy,4) + replace(str(mm,2),' ','0') + replace(str(dd,2),' ','0') <= @p_asofdate
group by apph_comp, apph_vend, apph_type, apph_id

update XAPAPTTOT
set xapt_last_payck =
(select max(apph_payck) from APPHISTF
where apph_comp = xapt_comp and apph_vend = xapt_vend and apph_type = xapt_type
and apph_id = xapt_id
and str(yy,4) + replace(str(mm,2),' ','0') + replace(str(dd,2),' ','0') = xapt_last_paydt )
where xapt_comp = @p_comp and xapt_vend = @p_vend and xapt_asof_date = @p_asofdate