Error during "Run Sitemap Generator"

Thanks for the reply i have taken all the add-ons as mentioned in your reply then tried running sitemap generator and getting all this im not sure if the script is working fine please log at the logs and me if its ok

[homepage] [4,942.8Kb mem used] [0s (+0s)]
[SECTION START] forumdisplay [4,942.8Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 1, total threads: 0, pages: 1 [4,942.8Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 2, total threads: 2, pages: 1 [4,942.9Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 3, total threads: 1, pages: 1 [4,943.0Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 4, total threads: 1, pages: 1 [4,943.1Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 5, total threads: 2, pages: 1 [4,943.2Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 6, total threads: 10, pages: 1 [4,943.3Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 16, total threads: 2, pages: 1 [4,943.4Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 19, total threads: 9, pages: 1 [4,943.6Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 17, total threads: 29, pages: 2 [4,943.8Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 18, total threads: 0, pages: 1 [4,944.2Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 8, total threads: 2, pages: 1 [4,944.4Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 9, total threads: 4, pages: 1 [4,944.6Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 10, total threads: 2, pages: 1 [4,944.8Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 20, total threads: 24, pages: 2 [4,945.0Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 21, total threads: 321, pages: 17 [4,945.3Kb mem used] [0s (+0s)]
[forumdisplay] forum_id: 23, total threads: 55, pages: 3 [4,948.6Kb mem used] [0s (+0s)]
[SECTION START] showthread [4,949.1Kb mem used] [0s (+0s)]
[archive homepage] [5,538.4Kb mem used] [0s (+0s)]
[SECTION START] forumdisplay archived [4,951.5Kb mem used] [0s (+0s)]
[SECTION START] member [4,951.5Kb mem used] [0s (+0s)]
[SECTION START] polls [5,155.0Kb mem used] [1s (+0s)]
[SECTION START] blogs [5,155.4Kb mem used] [1s (+0s)]
[SECTION START] albums [5,156.2Kb mem used] [1s (+0s)]
[SECTION START] groups [5,156.2Kb mem used] [1s (+0s)]
[SECTION START] tags [5,156.2Kb mem used] [1s (+0s)]
[SECTION START] blog tags [5,157.1Kb mem used] [1s (+0s)]
[create sitemap file] filename: sitemap_1.xml.gz, number of urls: 1388 [4,955.1Kb mem used] [1s (+0s)]
[create sitemap in text format] part #2 [4,955.1Kb mem used] [1s (+0s)]
[create sitemap index] filename: sitemap_index.xml.gz, number of sitemaps: 1 [4,955.2Kb mem used] [1s (+0s)]
Sitemap has been created. Click here to return [4,957.6Kb mem used] [2s (+2s)]

----->but then when i run the file made by this sitemap gen i get only this no sitemaps shown.
<?xml version="1.0" encoding="UTF-8" ?>
- <sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/09/siteindex.xsd">
- <sitemap>
<loc>http://www.mysitename.com/forum/sitemap_1.xml.gz</loc>
<lastmod>2009-06-28T03:09:14+00:00</lastmod>
</sitemap>
</sitemapindex>
Please reply thanks

Yes it looks like it succesfully created your sitemap files.