Getting NULL for the output, need help Emergently

[will2002297194]

Hi guys I have a project due for the coming Friday, I actually formed a strict data with first column dates and second column is the stock index number, wonder why I'm getting nothing for the output, I read through there are people have same issues but nobody gave a firmed answer, anyone can help at this point? Or let's say the package cannot handle an increasing stock index number.

Thanks for any help.

Partial Data set:
4/8/2005 | 1003.445
4/11/2005 | 995.421
4/12/2005 | 978.697
4/13/2005 | 1000.9
4/14/2005 | 986.975
4/15/2005 | 974.082
4/18/2005 | 963.772
4/19/2005 | 965.886
4/20/2005 | 950.867
4/21/2005 | 943.981
4/22/2005 | 939.101
4/25/2005 | 930.07
4/26/2005 | 937.083
4/27/2005 | 926.604
4/28/2005 | 942.073
4/29/2005 | 932.395
5/9/2005 | 909.174
5/10/2005 | 913.076
5/11/2005 | 901.851
5/12/2005 | 885.82
5/13/2005 | 887.543