although i use the proxy server, i can't access some web site, such as www.safeweb.com and www.altavista.com.
my proxy server is 212.178.3.72:80.

some days before is ok.

when i tracert www.altavista.com reply as follow:
1 * * * Request timed out.
2 63ms 94ms 87ms 218.1.1.253
3 222ms 191ms 182ms 218.1.1.137
4 151ms 133ms 89ms 218.1.1.242
5 91 ms 202 ms * 202.109.0.173
6 103 ms 215 ms 130 ms 202.109.0.154
7 136 ms 160 ms 186 ms 202.101.63.242
8 140 ms 129 ms 158 ms p-10-0-r1-c-shsh-1.cn.net [202.97.37.33]
9 102 ms 171 ms 171 ms p-4-0-r2-c-bjbj-1.cn.net [202.97.34.33]
10 * 170 ms 169 ms p-12-0-r1-c-bjbj-1.cn.net [202.97.37.1]
11 191 ms 132 ms 100 ms p-1-0-0-r1-i-bjbj-1.cn.net [202.97.33.2]
12 * * * Request timed out.
13 * * * Request timed out.
14 * * * Request timed out.
15 * * * Request timed out.
16 * * * Request timed out.
17 * * * Request timed out.
18 * * * Request timed out.
19 * * * Request timed out.
20 * * * Request timed out.
21 * * * Request timed out.
22 * * * Request timed out.
23 * * * Request timed out.
24 * * * Request timed out.
25 * * * Request timed out.
26 * * * Request timed out.
27 * * * Request timed out.
28 * * * Request timed out.
29 * * * Request timed out.
30 * * * Request timed out.

Trace complete.

and tracert www.bbsland.com as the same

maybe my isp block me to access the site,

and another problem is when i search the word "freenet" or "free net" the result is none.

why? how to solve the problem? and how to surf web free?