To Split data use below split function..

CREATE FUNCTION [dbo].[SplitString](@String varchar(8000), @Delimiter char(1))
returns @temptable TABLE (items varchar(8000))
as
begin
	declare @idx int
	declare @slice varchar(8000)
    
	select @idx = 1
		if len(@String)<1 or @String is null  return
    
	while @idx!= 0
	begin
		set @idx = charindex(@Delimiter,@String)
		if @idx!=0
			set @slice = left(@String,@idx - 1)
		else
			set @slice = @String
		
		if(len(@slice)>0)
			insert into @temptable(Items) values(@slice)

		set @String = right(@String,len(@String) - @idx)
		if len(@String) = 0 break
	end
return
end

GO
--now call your parameter as below

select * From dbo.SplitString('1-Jan-11;29-Sep-11;22-Jun-11',';')

--output
--items
--1-Jan-11
--29-Sep-11
--22-Jun-11

for error resolution, post your store procedure query..